Its not worth it, may sound appealing but if more than half us don't know how it works ( including me ), its not going to work out.
Its like buying stocks blindly and expecting them to go up. There has to be a lot of things involved. Sure you might say we just lose money on electricity, but most of us here built a computer to game and have fun.
I'm not against the idea or anything, but I don't think most of us really know what they might get into. I have a friend who's been trying to this and well, lets just say he's lost a lot of money. Someone didn't even pay him when he sold his mined up Bitcoins.
Again just my 2 cents, don't mean to discourage or offend anyone.